Fluorochemical surfactants for latex paints

ABSTRACT

IMPROVED STAIN AND DIRT RELEASE PROPERTIES ARE OBTAINED IN LATEX PAINT COMPOSITIONS BY INCORPORATING THEREIN A FLUOROCHEMICAL COMPOSITION HAVING HIGHLY DESIRABLE SURFACE ACTIVE PROPERTIES. THE SALT DERIVATIVES OF SUCH FLUOROCHEMICAL COMPOSITIONS HAVE BEEN FOUND TO PROVIDE THE MOST DESIRABLE PAINT COMPOSITIONS.

United States Patent 3,822,228 FLUOROCHEMICAL SURFACTANTS FOR LATEX PAINTS Robert G. Petrella, Glenolden, and Michael Langsam,

Allentown, Pa., assignors to Air Products and Chemicals Inc., Allentown, Pa.

No Drawing. Continuation-in-part of abandoned application Ser. No. 875,590, Nov. 10, 1969. This application Feb. 2, 1972, Ser. No. 222,976

Int. Cl. C08f 3/92, 15/36 US. Cl. 260-29.6 F 11 Claims ABSTRACT OF THE DISCLOSURE Improved stain and dirt release properties are obtained in latex paint compositions by incorporating therein a fluorochemical composition having highly desirable surface active properties. The salt derivatives of such fluorochemical compositions have been found to provide the most desirable paint compositions.

CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of application, Ser. No. 875,590, filed Nov. 10, 1969, now abandoned.

BACKGROUND OF THE INVENTION It is well known in the art to use various paints to obtain protective and decorative coatings. More recently,

latex paints have developed increased acceptability due to ease of application and other desirable properties. However, it has been found that the latex paint coatings show a tendency to retain stains and dirt thereby causing the coatings to become somewhat less attractive and more difficult to keep clean. Therefore, it would be highly desirable to provide a latex paint composition which would avoid the above problem.

SUMMARY OF THE INVENTION PREFERRED EMBODIMENTS OF THE INVENTION Both the fluorocarbon acrylic copolymers and salts thereof are suitable for use in a variety of latex paint compositions. Such paints include, for example, interior and exterior paints providing flat, semi-gloss and gloss finishes and are generally useful on substrates such as wood, metal, concrete, plastics and the like.

The fluorochemical compositions of the invention may be employed in various types of latex paints currently being used by the consumer. Such paints include those commonly known to or identifiable by the trade as containing vehicles such as 100% acrylics, vinyl-acrylic copolymers, vinyl chloride-acrylic copolymers, ethylenevinyl acetate copolymers, vinyl acetate copolymers such as those containing dibutyl maleate, and styrene-buta- 3,822,228 Patented July 2, 1974 diene latex copolymers. Such vehicles are generally dispersed in water, but are also suitably dispersed in various organic solvents such as polyhydric alcohols, ether alcohols, ester alcohols and the like.

The water soluble fiuorochemical compositions of the present invention comprise copolymers consisting of (a)' a fluorocarbon acrylic monomer of addition polymerized units from the structure:

R LZ wherein 'R, is:

where R is F or H and a is an integer of from 1 to 20;

( 3)z a( z)b,

where R is F or H and b is 0 and R is F when b is an integer of from 1 to 18 or where R; is F or C F and n is an integer of from 1 to 4 and where c designates an alicyclic structure;

'where R is an alkyl group having from 1 to 10 carbon atoms,

where n is a number from 0 to 2 or where R; is an alkyl group having from '1 to 10 carbon atoms;

where R, is H or CH and (b) a 0:,B-EthYlClJiC3llY unsaturated carboxylic acid.

Specific examples of types of fluorocarbon acrylic monomers used in the present invention include:

The above-described monomers are known compounds to persons of ordinary skill in the art and are well-documented in the literature. Copending patent application Ser. No. 608,510, now US. Pat. 3,600,433, illustrates perfiuorocyclohexane esters of acrylic and methacrylic acids. Other patents, such as US. 3,304,278, teach the preparation of pentafluoroethyl carbinol acrylate and US. 2,642,416 show methods of making pentadecafiuoro(nheptyl) carbinol acrylate. Omega-hydroperfluorocarbinol acrylates are prepared according to methods shown in US. 2,559,629 and transesterified with methyl methacrylate as described in Acrylic Resins, by M. B. Horn, Reinhold Publishing Co. at page 18, Processes for making perfiuoro alkyl-N-alkyl sulfonamido acrylates are shown in US. 2,803,615.

c deslgnates an alicyclic structure.

The fluorocarbon acrylic monomers are reacted with an afi-ethy lenically unsaturated carboxylic acid to provide a fluorochemical containing copolymer. Such acids include both the monoand dicarboxylic acids and include acrylic, methacrylic, itaconic, maleic, fumaric, crotonic acids and the like.

The'foregoing copolymers may be produced in accordance with methods known to the art such as by solution polymerization and emulsion polymerization techniques using free radical initiators. Where solution polymerization techniques are employed, the monomers are dissolved in an organic solvent at a concentration of about 15% to about 70% by weight. A copolymerization temperature of between 25 C. and about 150 C. may be employed, the preferred range being between about 60 and about 120 C. Suitable catalysts such as the various peroxide or azo types may be employed as a copolymerization initiator at a concentration of from 0.1 to 4% by weight of the reaction mixture.

Emulsion polymerization is carried out in a manner such that the' monomers to be copolymerized are emulsified in a water solution of surface-active agent to a given emulsion concentration of from about 5% to about 50%. -Usually, the temperature is raised to between 30 C. and 90 C. to effect copolymerization in the presence of an added catalyst selected from various peroxide, persulfate or azo types. The concentration of the catalyst for the copolymerization is usually between 0.01% and 2% based on the weight of the monomers. Anionic, cationic or non-ionic emulsifying agents can be employed as the surface-active agent to stabilize the emulsion during its make-up and copolymerization, but a surface-active agent of the cationic or non-ionic type is preferred.

The copolymer should contain a ratio of fluorocarbon acrylic monomer to a,;3-ethylenically unsaturated carboxylic acid in the range of from about 99:1 to about 50:50 by weight and preferably from about 95:5 to about 75:25 by weight.

The copolymers prepared in accordance with either of the solution or emulsion polymerization procedures described above may be reacted with a nitrogen-containing salt forming reagent to provide water-soluble salt derivatives of the invention. The salt derivatives are either primary, secondary or tertiary amines, which are inclusive only by way of example of both inorganic and organic amines, such as alkyl substituted amines, alkanolamines, nitrogen containing heterocyclics, cyclic amines, polyamines, ammonium hydroxide, and the like. Substituted amines may have one, two or all three of their hydrogens replaced with alkyl groups having 1 to 6 carbon atoms. The alkyls may be straight chain or isomeric like methylamine, ethylamine, diethylamine, triethylamine, tripropylamine, diisobutylamine. Alkyl substituted amines also encompass mixed amines such as N-ethyl-dipropylamine, N ethyl N methyl propylamine, N,N-dimethyl butylamine, etc. Alkanolamines which form salts with the taught copolymers usually have 1 to 3 hydroxyl groups and may also be primary, secondary or tertiary amines. Examples of suitable alkanolamines are ethanolamine and pentanolamine and related compounds having 2 and 3 hydroxy groups and in the range of 2 to 10 carbon atoms. Nitrogen-containing heteroeycles are inter alia both aromatic and non-aromatic types which may or may not be substituted, like imidazole, morpholine, piperidine'and alkyl substituted heteroeycles having 1 to 6 carbon atoms such as 2-ethyl imidazole. Cyclic amines and especially dicyclic compounds like triethylenediamine are useful salt forming agents. Examples of suitable polyamines are methanediamine, 1, 2 propanidamine, diethylene triaminc, etc.

The nitrogen containing salt forming agent is present in an amount from 0.5 to about 1.25 times the stoi-' chiometric amount required to neutralize the acid portion of the polymer.

1 known in the art. For example, interior flat paint, is prepared by (1) mixing together measured amounts of. water, dispersing agent, thickening agent and Wetting agent, and mixing the resulting mixture together .with an appropriate mixture (2) containing antifoam agent, coalescent agent, wet edge agent and a bacteriostat. Generally the mixture of (2) is slowly added to the mixture of (1) with stirring. To the admixture of (l) and (2) is added a third mixture containing a primary pigment (e.g. TiO clay extender and a dry hiding or flatting 1 agent such as SiO The resulting mixture is subjected to high shear mixing for about 15 minutes and subsequently to a lower mixing speed during which time additional amounts of thickener and anti-foam agent is added. Also during the period of low speed mixing is added the appropriate latex base or vehicle. Additional water may be added if needed and, where pH control is necessary, an appropriate base such as ammonia may be employed.

The latex copolymers and salt derivatives of the copolymers, as hereinbefore'described, are preferably added to a latex paint mixture as part of the dispersing agent as set forth in step (1) above. However it is to be understood that the latex copolymers may also be added after the paint mixture has been completely formulated. It has been found that desirable paint compositions are obtained when the latex copolymer or salt derivatives of thempolymers are present in amount of from about 0.1 percent to about 1.2 percent by weight based on the total solids content of the paint system.

The particular copolymers and salt derivatives of the invention, when added to latex paint compositions, have EXAMPLE 1 An undecafluorocylohexane carbinol acrylate and rnethacrylic acid copolymer was prepared as follows:

In a 250 ml. 3-necked round bottomed flask equipped with a stirring rotor, dropping funnel and reflux condenser was charged 100 ml. of 1,4-dioxane. The dioxane I was heated to reflux and from the dropping tunnel was addeddropwise over 2 hours a mixture of Undecafiuorocyclohexane carbinol acrylate g 40 Methacrylic acid g 10 nC H SH (n-dodecylmercaptan) ml 2 Di-t-butyl peroxide ml 3 After the addition was complete the mixture was refluxed for an additional 3 hours. The product was then cooled to room temperature and the polymer recovered.

EXAMPLE 2 The procedures of Example 1 were substantially repeated except that 40 gms. of undecafluorocyclohexane carbinol methacrylate and 10 gms. of methacrylic acid were substituted.

EXAMPLE 3 In a stirred reactor equipped with a septum cap was placed Undecafluorocyclohexane Carbinol Acrylate g 22.5

Methacrylic Acid g 2.5 Tetrahydrofuran (THF) ml 175 nc12H25SH ml.. Benzoyl peroxide g 0.5

The mixture was agitated at 70 C. for 6 hours. At 1 /2, 3 and 4 hours a mixture of: benzoyl peroxide 0.5 g. and THE 5.0 ml. was injected into the reactor. At the end of six hours the reactor was cooled and the polymer recovered.

From this mixture, g. were added to 125 ml. of water and 5 g. of 28% sodium lauryl sulfate solution in a 250 ml. 3-necked round bottom flask equipped with a stirring rotor, dropping funnel, thermometer, and reflux condenser. The mixture was stirred and purged with a stream of N for 30 minutes. Then 0.25 g. (NH S O and 0.25 g. sodium bisulfate were added. This mixtureat 30 C.-was stirred and the remaining portion of the mixture (35 g.) was added over a period of 90 minutes and the temperature increased to 60 C. After all the mix had been added, the temperature was rapidly raised from 60 C. 9092 C. and the temperature maintained for 30 minutes. The mixture was then cooled to room temperature and the polymer recovered.

EXAMPLE 5 To a 250 ml. S-necked round bottom flask equipped with a stirring rotor, reflux condenser and dropping funnel was placed 100 g. of meta-xylene. The meta-xylene was heated to reflux and from a dropping funnel a mixture of G. Undecafluorocyclohexane carbinol acrylate Acrylic acid 25 di-t-butyl peroxide 3 HC12H25SH 5 was added with stirring over a period of 5 hours. The product was cooled to room temperature and the polymer recovered.

EXAMPLE 6 The procedures of Example 5 were substantially repeated except that the following mixture was substituted:

G. Heptafluoro(n-propyl) carbinol acrylate 40 Methacrylic acid l0 EXAMPLE 7 In a 250 ml. 3-necked round bottomed flask equipped with a stirring rotor, reflux condenser and a dropping funnel was placed 75 g. of meta-xylene. The meta-xylene was heated to reflux and from the dropping funnel a was added dropwise to the refluxing xylene over a period of 2 hours. The refluxing wa continued for an additional 3 hours. The polymer was cooled to 61 C. and 25 g. of absolute ethanol was added.

EXAMPLES 8-18 The procedure outlined in Example 1 was substantially repeated except that the following monomers were substituted Example No 8 9 10 11 12 13 14 15 Nora:

BA Heptafluoro (n-propyl) carbinol acrylate. 0A Pentadeeafiuoro(n-heptyl) carbinol acrylate. CA Undecafluorocyclohexnne carbinol acrylate. QHCSMA=5-hydrooctafluoro(n-buty1) carbinol acrylate. mHCuA l1-hydroeicosatluoro(n-decyl) carbinol acrylate. SFKA=bis-(trifluoromethyl) carbinol acrylate. PA=Pentafluoroethyl carbinol acrylate. nBA=Perfluoro-t-(n-butyl)cyclohexane carbinol acrylate. MAA Methacrylic acid. AA=Acrylic acid.

EXAMPLE 19 Following the procedures of Example 3, the reactor was charged with Heptafluoro(n-propyl carbinol acrylate g 10 Undecafluorocyclohexane carbinol acrylate g 10 Methacrylic acid g 5 HC12H25SH ml 1.5 Benzoyl peroxide g 0.5 Tetrahydrofuran ml 175 The mixture was agitated at C. for 6 hours. At 1 /2, 3 and 4% hours, an additional increment of 0.5 g. of benzoyl peroxide was introduced. The reaction mixture was cooled and the polymer product recovered.

EXAMPLE 20 The procedures of Example 1 were substantially repeated except that 40 gms. of pentadecafluoroheptyl-N- ethyl-sulfonamido ethyl acrylate was substituted for the undecafluorocyclohexane carbinol acrylate.

EXAMPLE 21 The procedures of Example 1 were substantially repeated except that 40 gms. of undecafluorocyclohexane- (N-t-butyl)-carboxamido-N-(2-ethyl)acrylate and 10 gms. of acrylic acid were substituted for the undecafluorocyclohexane carbinol acrylate and methacrylic acid.

EXAMPLE 22 EXAMPLE 23 A sample of product prepared by the procedure described in Example 1 was dried, i.e., freed of solvent substantially completely, in a Biichi Rotavapor, a device designed for containment of sample material with rotation thereof under vacuum conditions to effect evaporative drying. The dried copolymer (2.8 g.), designated as being a copolymer of (by weight) undecafluorocyclohexane carbinol acrylate and 20% (by weight) methacrylic acid was added to an aqueous solution of 2.0 g. of triethanolamine in 10 g. of demineralized water. With mild agitation, the reaction of the polymer and the amine to form the salt was complete to subsequently provide a stable solution.

EXAMPLE 24 A 6.0 g. sample of the dried copolymer of Example 23 was added to a solution of 2.2 g. of NH OH (28%) in g. of demineralized water. Salt formation was incomplete with this amount of available NH OH as shown by existence of a dispersion in the slightly colored solution. Upon addition of 3 g. of triethanolamine the reaction was complete as evidenced by a clear solution.

EXAMPLE 'tformation of a water-white, stable solution of the copolymer salt.

EXAMPLE 26 An 8.0 g. sample of the dried copolymer of Example 25 was added to a solution of 4.0 g. of NH OH (28%) in -g. of demineralized water. The salt derivative of the copolymer was formed after the further addition ofan aqueous solution of 4 g. of triethanolamine in 20 g. of demineralized water.

EXAMPLE 27 Product prepared as described in Example 19 was subjected to drying as described in Example 23. Of the'dried product designated as the mixed copolymer composition of heptafluoro(n-propyl) carbinol acrylate, 40% perfluorocyclohexylacrylate and 20% methacrylic acid, 4.1 g. was added to an aqueous solution of 4.0 g. of triethanolamine in 40 g. of demineralized water. Formation of the polymer salt occurred over a period of time with stirring.

EXAMPLE 28 A 20 g. sample of the dried copolymer as in Example 23 was placed in a Erlenmeyer flask with 30 g. of demineralized water. An aqueous solution of 6.0 g. of diisobutylamine in 20 g. of demineralized water was prepared and added to the flask. Upon stirring, the copolymer salt was formed as evidenced by a clear solution.

EXAMPLE 29 EXAMPLE 30 Three parts by weight of the dried copolymer as prepared in Example 25 were placed in a flask with 12.0 parts by weight of water. The flask was added one part by weight of triethylamine. The mixture was stirred and the completely water soluble copolymer salt was formed.

EXAMPLE 31 A mixture of 6 parts by weight of the dried copolymer as prepared in Example 23, 20 parts by weight of demineralized water and 1.3 parts by weight of an aqueous solution of ethylamine (70%) was stirred in a flask until the copolymer salt formation was complete.

EXAMPLE 32 A mixture of 6 parts by weight of the dried copolymer as prepared in Example 25, 30 parts by weight of demineralized water and 1.3 parts by weight of an aqueous solution of ethylamine (70%) was prepared in a flask and stirred until the copolymer salt formation was complete.

EXAMPLE 33 A 30 g. sample of the dried copolymer as prepared in Example 23 was placed in a flask with 40.7 g. of de- 8. mineralized water. To the flask was added an aqueous solution consisting of 4.1 g. of triethylenediamine and 13.0 g. of demineralized water was added. Analysis of the product showed that the copolymer salt formation was complete even though the final solution was slightly cloudy.

EXAMPLE 34 Twenty parts by weight of the copolymer of Example 1, dried as in Example 23 were placed in a container with 30 parts by weight of demineralized water. To this was added an aqueous solution consisting of 4.5 parts by weight of 2-ethylimidazole in 20 parts by weight of demineralized water. The mixture was stirred until the copolymer salt formation was complete and a clear solution was obtained.

- EXAMPLE 35 The procedures of Example 34 were substantially repeated except that 3.2 parts by weight of imidazole was substituted for the 2-ethylimidazole. Salt formation was evidenced by a clear solution.

EXAMPLE 36 A mixture was prepared in a container of- 25 parts by weight of dried copolymer of Example 1, 100 parts by weight of demineralized water, and 5.7 parts by weight of morpholine.

The copolymer salt formed upon mild agitation and the final solution was clear and had a very light color.

EXAMPLE 37 The procedures of Example 36 were substantially repeated except that the dried copolymer of Example 2 was employed. Copolymer salt formation was evidenced by a light colored product.

EXAMPLE 3:;

A sample of copolymer prepared as in Example 9 and dried by the Rotavapor technique was used in an amount of 17.5 parts byweight and placed in a container with 40 parts by weight of demineralized water. To the container was addedv an aqueous solution consisting of 2.8 parts by weight of ethylamine solution concentration in water) in' 10 parts by weight of demineralized water. The admixture was stirred until the copolymer salt formation was complete and a clear solution obtained.

EXAMPLE 39 A sample of copolymer prepared as in Example 11 and dried by the Rotavapor technique was employed in an amount of 36 parts by weight and placed in a stirring kettle with 60 parts by weight of demineralized water. To the kettle was then added, with vigorous stirring, an aqueous solution of 4.0 parts by weight of ethylamine (70% in water) solution and 29.3 parts by weight of demineralized water. A subsequent addition was made of 0.5 part by weight of ethylamine solution (70% in water). Copolymer salt formation was complete after 8 hours of agitation and a clear product solution was produced.

EXAMPLE 40 A sample of copolymer prepared as in Example 5 and dried by the Rotavapor technique was used in an amount of 43.1 parts by weight and placed in a stirring kettle with 60 parts by weight demineralized water. To the kettle was added an aqueous solution consisting of 32 parts by weight of ethylamine solution (70% in water) and 27.3 parts by weight of demineralized water. Upon vigorous stirring, the copolymer salt formation was completed. The clear solution has an undesirably high viscosity and an additional 30 parts by weight of demineralized water were added with stirring. The final product was a clear solution.

9 EXAMPLE 41 A sample of copolymer prepared as in Example 3 and dried by the Rotavapor technique was employed in an amount of 45 parts by weight and placed in a stirring kettle with 35 parts by weight of demineralized water. To the kettle was added an aqueous solution consisting of 1 part by weight of ethylamine solution (70% in water) and 20 parts by weight of demineralized water. This admixture was stirred vigorously and copolymer salt formation was completed to provide a clear product solution.

EXAMPLE 42 A g. sample of the copolymer prepared in Example 8 and dried by the Rotavapor technique was placed in an Erlenmeyer flask with 30 g. of demineralized water. To the flask was added an aqueous solution consisting of 1.5 g. of ethylamine solution (70% in water) and 10 g. of demineralized water. The mixture was stirred until the copolymer salt formation was complete and a clear solution was obtained.

EXAMPLE 43 Twenty parts by weight of the copolymer as produced in Example 20 and dried as in Example 23 were placed into a container with 30 parts by weight of demineralized water. To the container was added 3 parts by weight of an aqueous solution of 70% ethyl amine in 20 parts by weight of demineralized water. The mixture was stirred until the copolymer salt was formed and a clear solution obtained.

EXAMPLE 44 The procedures of Example 43 were substantially repeated except that 20 parts by weight of the copolymer as prepared in Example 21 were substituted for the copolymer of Example 20.

EXAMPLE 45 The procedures of Example 43 were susbtantially repeated except that 20 parts by weight of the copolymer as prepared in Example 22 were substituted for the copolymer of Example 20.

EXAMPLE 46 20 g. sample of the copolymer prepared in Example 13 and dried by the Rotavapor technique was placed in an Erlenmeyer flask with 30 g. of demineralized water. To the flask was added an aqueous solution consisting of 1.5 g. of ethylamine solution (70% in water) and 10 g. of demineralized water. The mixture was stirred until the copolymer salt formation was complete and a clear solution was obtained.

Many of the fiuorochemical compositions of the invention were tested for effectiveness as surfactive additives to various commercial paint systems and included the latex paints-interior semi-gloss, exterior flat, interior flat, and very high quality interior flat. Tests were conducted wherein the fiuorochemical compositions were added to the paint by post addition, i.e. by adding the salt to the formulated paint by simple admixture, or by substituting part of the dispersing agent with the fiuorochemical compositions prior to the high shear mixing stage. Generally, the modified paints were allowed to stand overnight before their application as coatings to test panels.

The test films were cast onto the panels using a 7 mil latex film applicator, i.e., a device designed to spread a uniform 7 mil film of paint on the test panels, and were airdried a minimum of 4 days prior to testing. The stain removal tests were run on a Gardner Scrub Machine using a cellulose sponge and holder such that the total load on the panel was one pound. Lava soap was the standard scrub medium. Six stain agents were applied to the paint film one hour before starting the scrub test which is described in Federal Specification 141a-6141. The test stains were lipstick, a 68 lead pencil, china marking crayon, ballpoint ink, olive oil and merthiolate. Results are shown at z and 6, meaning better, equal to or poorer than the results obtained on the control panel.

The oleophobicity test method involved placement of the coated panel on a level surface. A series of oil samples having differing surface tension values were available for test purposes and are listed as follows: l. mineral oil 2. 65% mineral oil-35% hexadecane '3. hexadecane 4. dodecane 5. decane 6. nonane 7. octane 8. heptane The higher numbers shown in the test results indicate a higher oleophobic value for the paint surface. The oleophobic value was determined by applying a drop of oil to the painted surface, starting in each instance with the oil having the highest surface tension values and progress ing with each successive numbered oil, until the surface tension of a particular oil sample was lower than the surface free energy of the paint film as shown by spreading of the oil across the paint film.

-In the shake and rinse test, a painted test panel was placed in a paper bag containing 50 g. of synthetic dirt. The bag was closed and the contents shaken vigorously for 30 seconds in a manner such that the dirt continuously struck the painted surface. The panel was then removed from the bag and rinsed for 5 seconds under running tap water, air dried and rated visually on the basis of relative appearance as compared with a control panel. The panels were given a rating based on a value of 10 for an appearance equivalent to that of the clean control panel to a value of l where the surface appeared dark brown. The synthetic dirt was composed of 38% peat moss, 17% portland cement, 17% kaolin clay, 17 silica, 1.75% furnace black, 0.5% red iron oxide and 8.75% mineral oil.

EXAMPLES 47-50 Fluorochemical compositions in acrylic latex flat wall paint Control 47 48 49 50 Paint composition (all in parts by weight):

Water 78. 4 78. 4 78. 4 78. 4 78. 4 Primary dispersing agent. 6. 0 6.0 6.0 3. 6 2.4 Wetting agent 1.2 1. 2 1.2 1.2 1. 2 Thickening agent--- 163.5 163.5 163. 5 163. 5 163. 5 Anti-foam agent 1.8 1. 8 1. 8 1.8 1. 8 Coalescing agent- 18. 0 18. 0 18. 0 18. 0 18. 0 Wet edge agent--." 9.0 9.0 9. 0 9.0 9.0 Anti-mildew fungici 0. 6 0.6 0. 6 0.6 0. 6 Ti 108.0 108. 0 108. 0 108. 0 108. 0 31. 5 31. 5 31. 5 31. 5 31. 5 78.0 78.0 78.0 78.0 78.0 Synthetic silica..- 16.2 16.2 16,2 16.2 16.2 acrylic resin. 155.0 155.0 155. 0 155. 0 155.0 NILOH 1.0 1.0 1.0 1.0 1.0 Fluorochemical additive:

Fluorochemieal salt oi Example 31, parts by weight oi solids 3.0 Flucrochemical salt oi Example 38, parts by weight of solids 3.3 6. 6 9.9 Fluorochernical salt;

solids, percent of total Weight 0 0.3 0.3 0.6 0.9 Viscosity, kreb units 118 104 106 96 Stain removal testsA (Gardner scrub machine-Lava. soapcellulose sponge) Cycles 47 48 49 50 Lipstick +2, 000 +2, 000 +2, 000 +2, 000 +2, 000 Permanentink +2, 000 +2, 000 +2, 000 +2, 000 +2, 000 Washable ink +2, 000 +2, 000 +2, 000 +2, 000 +2, 000 Lemon juice-.- 432 350 China marker. 864 5 640 645 l, 025 Ball point. +2000 +2, 000 +2,000 +2, 000 +2, 000 Pencil- 30 97 300 1, 130 Olive oil 200 8 121 60 250 Compared to nonfiuorochernical content Visual rating:

Lipstick Permanent ink Washable ink Control Ball point... Olive oil 1 The oil stain disappeared during the scrub cycles but reappeared after standing.

NorE.Ascrub test, "Wnshabllity of Points Federal Specifications 14la-6141".

EXAMPLES 55-57 Salts of fluorochemical compositions in fiat latex interior paint Control 51 52 53 P I 1 t rt b 1 Control 55 56 57 mm ormu 2. ion, pa s y weig 1t:

Paint formulation, parts by weight: 5 Water 78.1 78.1 78.1 78. 1 Water 78.4 78.4 78. 1 78.4 Dispcrsing agent 6.0 6.0 6.0 6.0 Dispersing agent. 6v 3. 6 3.6 3.6 Wetting agent 1.2 1.2 1.2 1. 2 Wetting agent 1.2 1.2 1.2 1.2 Cellulosic thickener. 163. 163.5 163.5 163.5 Ccllulosic thickener 163.5 163.5 163.5 163. 5 Anti-foam agent 1. 1.8 1.8 1.8 1.8 Antifoam agent.-- 1.8 1. 8 1.8 1.8 coalescing agent- 18.0 18.0 18. 0 18.0 Coalescing agent. 18.0 18.0 18.0 18.0 Wet edge agent 9.0 9.0 9.0 9.0 Wet edge agent 9.0 9. 0 9.0 0.0 Anti-mildew fungicide 0.6 0.6 0.6 0.6 Anti-mildew fungicide 1.2 1.2 1.2 1.2 10 T10, 108.0 108.0 108.0 103.0 T10; 108.0 108.0 108.0 108.0 Natural silica- 31.5 31.5 31.5 31.5 Natural SiO2 31.5 31.5 31.5 31.5 Calcincd clay. 78.0 78.0 78.0 78.0 Calcined clay 78. 0 78.0 78. 0 78.0 Synthetic SiO 16.2 16. 2 16.2 16.2 Synthetic SiOg. 16.2 16. 2 16. 2 16.2 100% acrylic resin. 155.0 155.0 155.0 155.0 100% acrylic resin 155. 0 155. 0 155.0 155. 0 NH4O 1 1.0 1. 0 1.0 l. 0 NH4OH 1.0 1 .0 1.0 1. O Fluorochemical modifiers:

Eluorochemical modifier: Fluorocliemical salt of Example Fluorochemical salt of Example 46, parts by weight of solids 3.5

31, parts by wcight of! lszolids.i 6,0 Flausorochenlllical sol; oii Ewlrlzgnple 4 7 Fluorochemical sat o xamp e ,parts y \veig to so 5 39, parts by weight oi solids 6.0 Fluorochcmical salt of example Fluorochemical salt of Example 42. parts by weight of solids 4.2

40, parts by iivciglit of 1stollidsfl. 6.9 Fluorochemicall saltis solids, per- 0 o 4 Fluorochemica sa t so s, percent on tota so i s .4 0. 0.4 cent of total weight 0 0.6 0.6 0-6 Viscosity, kreb units. 92 96.5 89 86 Viscosity, kreb units 108 102 109 110 Oleopllic value 1 1 5 5 Stain removal tests (Gardner scrub machine-Lava soap-cellulose Scrub test (N0.'0f cycles to remove stain agent) sponge) Cycles 55 56 57 Cycles 51 Y 52 53 K15 35 +2 3 2% Lipstick +2, +2000 +2000 +2000 China markingpenciL 158 166 323 Permanent lnk +2, 000 +2, 000 +2, 000 +2, 000 Ballpoint pen 1,500 1,765 +2, 000 1,585

Washable ink. +2, +2, 000 Olive oil (apparent)- 7 80 56 Lemon iuioe.. 860 Merthiola te 340 450 +2,000 770 6 5 Sheen rating visual (1) 425 410 \usual rating of stain remov 000 +2,000 rated against control:

30 25 Lipstick 6 Ballpoint 0 i t h i 1; e o a e Permanent l A e qual. y figg g 3; i 2 The olive oil penetrated and its stain required a visual rating alter 011 1 31118125" II: Control Control Control Control drying because it reappeared 3111 pentcil Control Control 1 Control EXAM L S 53- 1 011215311 Salts of fluorochemicai compositions in flat latex interior paint 1 The surface oil disappears during the scrub cycles but resuriaces Control 58 59 60 61 after standing over night. Pizivrggiiila'mulation, parts by 40 Water 7a 1 7s. 1 7s. 1 7a 1 78.1 Dlspersing agent 6.0 6.0 6.0 6.0 6.0 Wetting agent--- 1.2 1.2 1.2 1.2 1.2 Cellulosic thickener- 163. 5 163.5 163. 5 163. 5 163. 5 Anti-foam agent" 11. 8 8.0 EXAMPLE 122 22 2-= 2-2 2-2 2-2 2-2 11 -mi ew angle 0 0.6 Fluorochemical compositions in interior acrylic latex paint g r 1 i 2? 2 g? 2 g? 2 lgso m8 0 a ura si 08.. 1.5 31.5 Calcined clay gg 2g 78. 0 7s. 0 7s. 0 16. 2 16. 2 16. 2 ttgfg pm by 784 78,1 155. 0 155.0 155. 0 155.0 155. 0 m m agent 0 4 3 NHEOH :fi L0 L0 1.0 1.0 1.0 wetting 12 1. 2 Fluoroc emlilcalfimodi lersi Cellulosic thickener 10a. 5 103.5 F 11mm 6 cal $8 1 Anti-foam agent- 1.8 1.8 f g g by Coalescing agent. 18.0 18.0 Wag t f wet edge agmt 90 o Fluorochemical salt of anti-mildewiungicide- 0. x 103.?) f fi ggl g gg y 3 1 fifitygrgag'a $15 Fluorochemical 5.12 of 78.0 78. 0 Exflmple Parts by 1&2 1&2 weight of sohds 3, 1 1550 0 Fluorochemlcal salt 01 erg so wwgal Fluorochemical salts l l 1 Il1l l li 1E 1 31 0 7 s ssgllgg' percent on total 0 3 3 3 8 e x-amp e 0 Viscosity k'riiiifiiis 110 110 107 100 109 F 0 6 Oleqvhobic value 1 2 5 5 4 k b 't. 93 85 29 ,32: 3 Scrub test (No. of cycles to remove stain agent) Cycles 58 59 60 61 Scrub test (Dried 4 days before testing cycles to remove stain g Lipstick: +2, 000 +2, 000 +2 000 +2, 000 +2, 000 Lead pencil- 800 600 500 700 Cycles 54 65 l l t pencll' +2 338 +2 003 +2 000 +2 485 a pom pen..- 2.000

China mark e1 860 980 Merthwmte" 000 000 +1 000 000 Ballpoint pen.-. 1,760 1,780 ,1 p

Olive Oil 1 900 16 1sual rating 01 star Merthiolate-.. 420 45s rated 88am Sheen buildup... 0 10 g g Visual examination of stain removal against control. p f a Li suck Ballpoint pen 9 13 51 'e' n A u Olive ()livg oil I u Menhiolme 1 The olive oil penetrated and its stain re uired a isual ti 1 1 The surface oil disappears during the scrub cycles but resurfaces alter becaiisc it reappeared. q v m a ter cqua tending over night. 5

13 EXAMPLE 62 Following the procedures of Example 4, a copolymer of perfiuorocyclohexaneacrylate 2-ethylhexylacrylatemethacrylic acid was prepared using the following in- The copolymer total solids recovered was 26.5 g. On the. basis of the solids in the fiuorochemical compounds, 1.0 weight percent was added to the control paint composition of Example 48 with the following results:

Example 62 Control Product Oleophobic value Stain removal:

Olive oil Motor oil- Chlorox EXAMPLES 63 AND 64 Fluorochemical compositions in exterior latex paint Control EXAMPLES 65-67 Baits oi fluorochemical compositions in exterior acrylic latex paint Control 65 6 Paint formulation (parts by weight):

Water Dispersing agent. Wetting agent. Anti-foam agent- Wet Edge agent" F cide (ll le l l loslo thickener NH Flnorochemicel modifiers:

Fluorochemlcal salt of Ex 46 Fluorochemical salt oi Ex. 38 Fluoroehemieal salt of Example 42- Fluorochemlcal salt, percent total solids Oleophobie value Viscosity, kreb units.. Shake and rinse test We claim:

1. A water soluble polymeric composition consisting essentially of (1) solid copolymers consisting essentially of (a) a fluorocarbon acrylic monomer of addition polymerized units from the structure:

wherein R, is R (CF )a, where R is or H and a is an integer of from 1 to 20,

( a)2 s( 2)b-,

where R is F or H when b is 0 and R is F when b is an integer of from 1 to 18 or R (cC F where R is F or C F and n is an integer of from 1 to 4 and where cdesignates an alicyclic structure;

L is:

s -SOr--I1I(CHg)zO-,

where R is an alkyl group having from 1 to 10 carbon atoms, 2)n 'e where n is a number from 0 to 2 or where R is an alkyl group having from 1 to 10 carbon atoms;

Z is:

0 R1 -1'J$=CH:,

where R; is H or CH and (b) an a,B-ethylenically unsaturated monoearboxylic acid, the ratio of fluorocarbon acrylic monomer to the carboxylic acid being in the range from about 99: 1 by weight to about 50:50 by weight, and (2) a nitrogencont-aining salt forming agent from 0.5 to about 1.25 times the stoichiometric amount required to neutralize the acid portion of the polymer selected from the group consisting of primary, secondary and tertiary amines.

2. The composition of Claim 1 wherein the nitrogencontain'ing salt forming agent is ethylamine, diethylamine, triethylamine, triethanolamine, triethylenediamine, diisobutylamine, ethylimid'azole, imid'azole or morphoiine.

3. The composition of Claim 2 wherein the fluorocarbon acrylic monomer is undecafluorocyclohexane carbinol acrylate and the carboxylic acid is methacrylic acid.

4. The composition of Claim 2 wherein the fluorocarbon acrylic monomer is undeeafluorocyclohexane c-arbinol methacrylate and the carboxylic acid is methacrylic acid.

5. The composition of Claim 2 wherein the fluorocarbon acrylic monomer is pentadecafluoro (n-heptyl) carbinol acrylate and the carboxylic acid is methacrylic acid.

6. The composition of Claim 2 wherein the fluorocarbon acrylic monomer is S-hydrooctafluoro (n-butyl) carbinol methacrylate and the carboxylic acid is methacrylic acid.

7. The composition of Claim 2 wherein the fluorocarbon acrylic monomer is pentadecafiuoroheptyl-N-ethylsulfonam'ido ethyl acrylate and the carboxylic acid is methacrylic acid.

8. The composition of Claim 2 wherein the fluorocarbon acrylic monomer is undecafiuorocyclohexane-(N-t-butyl)- 15 carbonamido-N-(2-cthyl-) acrylate and the carboxylic acid is acrylic acid.

9. The composition of Claim 2 wherein the fluorocarbon acrylic monomer is 1,l,2,Z-tetrahydroheptadecafiuoro decyl methacrylate and the carboxylic acid is acrylic acid.

10. The composition of Claim 2 whereinthe fluorocarbon acrylic monomer is a mixture of hept-affuoro (n propyl) carbinol acrylate and undecafiuorocyclohexane carbinol acrylate and the carboxylic acid is methacryl'i'c acid. l I Y 11. The composition of Claim 2 wherein the fluorocarbon acrylic monomer is perfiuoro-4-(r -butyl) cyclohexane carbinol acrylate and the carboxylic acid is methacrylic acid.

I vUNITED STATES PATENTS v H -?/,1-8'.'Z,O47v 5/1965 Wehrmeister et al. 260-86.l 3,198,770 8/1965 Watkins 260486.l N 3,372,149 3/1968 Fertig et al 260--86.l N

. OTHER REFERENCES v V Meares: Polymers: Structure and Bulk Properties; 1967; p. 13.. O

References Cited HA'ROLD D. ANDERSON, Primary Examiner us. 01. x111;

M7 132 CF, 148, 161 Us; 2'60I7.4 CL, 29 6"F,' 2916 15 RW,29.6 MN, 78.5 BB, 78.5 r, 80.81, 86 m y 

